WO2003084699A1 - Procede de commande synchrone de broche et appareil specialement prevu pour ce procede - Google Patents

Procede de commande synchrone de broche et appareil specialement prevu pour ce procede Download PDF

Info

Publication number
WO2003084699A1
WO2003084699A1 PCT/JP2002/003436 JP0203436W WO03084699A1 WO 2003084699 A1 WO2003084699 A1 WO 2003084699A1 JP 0203436 W JP0203436 W JP 0203436W WO 03084699 A1 WO03084699 A1 WO 03084699A1
Authority
WO
WIPO (PCT)
Prior art keywords
guide bush
spindle
work
spindle motor
motor
Prior art date
Application number
PCT/JP2002/003436
Other languages
English (en)
Japanese (ja)
Inventor
Masakazu Sagasaki
Original Assignee
Mitsubishi Denki Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Denki Kabushiki Kaisha filed Critical Mitsubishi Denki Kabushiki Kaisha
Priority to PCT/JP2002/003436 priority Critical patent/WO2003084699A1/fr
Priority to TW091107840A priority patent/TW524725B/zh
Publication of WO2003084699A1 publication Critical patent/WO2003084699A1/fr

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/416—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control of velocity, acceleration or deceleration
    • G05B19/4163—Adaptive control of feed or cutting velocity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/72—Auxiliary arrangements; Interconnections between auxiliary tables and movable machine elements
    • B23Q1/76—Steadies; Rests
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/49—Nc machine tool, till multiple
    • G05B2219/49108—Spindle speed

Definitions

  • the present invention relates to a spindle synchronous control method and apparatus for synchronously controlling a main spindle such as an automatic lathe and a guide bush spindle.
  • Fig. 10 shows the main spindle motor that drives the main spindle of the automatic lathe (hereinafter referred to as the main spindle motor) and the main spindle motor that drives the mouth guide bush (hereinafter referred to as .mouth single guide bush spindle).
  • Block diagram showing the main parts of a numerical control device having a spindle synchronous control device that performs synchronous control of a motor).
  • Fig. 11 is a block diagram of an automatic lathe, which is a type of machine tool.
  • Fig. 1 is a detailed configuration diagram of the main spindle and rotary guide bush shown in Fig. 13. Fig.
  • FIG. 13 is a diagram showing a machining program of the main part that controls the rotation and stop of the main spindle motor
  • Fig. 14 is a guide.
  • FIG. 15 is a time chart showing a change in the bushing spindle motor current during actual cutting.
  • FIG. 15 is a cross-sectional view showing a positional relationship between the rotary guide bush and the round work.
  • 1 is a numerical control device
  • 2 is a machining program
  • 3 is a processing program analysis processing unit
  • 4 is an interpolation processing unit
  • 5 is a ladder circuit
  • 6 is a machine control signal processing unit
  • 7 is a memory
  • 8 is a parameter setting section
  • 9 is a screen display section
  • 10a is an axis control section of the main spindle (hereinafter, referred to as main axis control section)
  • 10b is an axis control section of the rotary guide bush spindle (hereinafter, guide bush axis).
  • 1 1 is the data input / output circuit
  • 1 2 a is the main spindle of the main spindle Amplifier (hereinafter referred to as main spindle amplifier)
  • 1 2b is a guide bush spindle amplifier (hereinafter referred to as guide bush spindle amplifier)
  • 13a is a main spindle main spindle motor (hereinafter referred to as main spindle motor).
  • main spindle motor main shaft motor of the mouth bushing guide bush spindle (hereinafter referred to as the mouth bushing guide bush spindle motor).
  • 100 is a housing of an automatic lathe machine, 100 is a tool for cutting a work described later, and 100 is a tool 100 1 Holder, 1003 is a work piece made of one long round metal material called bar material, 1004 is the main spindle, 1005 is the rotary guide bush, and 1006 is the rotary guide A pulley provided at the shaft end of the bush spindle motor 13b, and 107 is a timing belt.
  • One long workpiece 1003 is supported by a chuck (not shown) of the main spindle 1004 and a rotary guide bush 1005. Then, the workpiece 1003 is rotated by a rotation command for the main spindle 1004, further moved from right to left by a command for the Z-axis, and turned by a tool 1002 moving up and down. You. At this time, the rotary guide bush 1005 is controlled to rotate in synchronization with the main spindle 1004.
  • the coordinate system of an automatic lathe usually takes the Z axis in the horizontal direction and the X axis in the vertical direction.
  • the holder 1002 is configured to move only in the X-axis direction.
  • the main spindle 100 4 is configured such that the main spindle motor 13 a itself forms a headstock. That is, the rotation speed ratio between the main spindle 1004 and the main spindle motor 13a is 1: 1. Then, the lowway guide bush 1 0 5 The bus is connected to the pulley via a pin 108, and driven by a low guide bush spindle motor 13b.
  • the pulley ratio (gear ratio) between the first guide bush 1005 and the low guide bush spindle motor 13b is assumed to be 1: 1.
  • the rotary guide bush spindle motor 13b is controlled to rotate in synchronization with the main spindle motor '13a, the rotary guide bush 1005, the main spindle 1004 and the main spindle chuck are controlled.
  • the round work 1 0 0 3 gripped by will rotate synchronously.
  • the command M3 is a rotation start command for the main spindle motor 13a
  • the command S1 is a rotation speed command for the main spindle motor 13a ( In this case, the rotation is performed at 100 rpm)
  • the command M5 represents a command to stop the rotation of the main spindle motor 13a.
  • the main spindle motor 13a and the mouth bushing guide bush spindle motor 13b are always set to rotate in synchronization with parameters or the like in advance.
  • the machining program 2 read from the tape reader or the like is stored in the memory 7.
  • the machining program analysis processing unit 3 reads out the block program 2 from the memory 7 block by block, and the read machining program 2 is processed by the machining program analysis processing unit 3. .
  • the machining program analysis processing unit 3 first reads the rotation start command M 3 and the rotation speed command S 1 of the main spindle motor 13 a from the memory 7. These instructions read out next are determined as instructions to be notified to the ladder circuit 5 which describes the control of the machine control signal when the cutting oil is turned on / off, etc. • The control signal processor 6 is notified of the analysis result. Machine control signal processing unit 6 The known analysis result is converted into a machine control signal and output to the ladder circuit 5.
  • the ladder circuit 5 determines whether the main spindle motor 13a is in a rotatable state, and if it is in a rotatable state, sets the rotation start signal and the rotation speed command S1 to the rotation speed data and executes the machine control signal processing section. Output to 6.
  • the rotation start signal and the rotation speed data input to the machine control signal processing unit 6 are passed to the interpolation processing unit 4.
  • the interpolation processing unit 4 converts the rotation speed data into the rotation position command of the main spindle motor 13a.
  • the contact guide bush spindle motor 13 For b calculate the rotation position command of the rotary guide bush spindle motor 13b from the rotation speed data of the main spindle motor 13a.
  • the rotational position commands of the main spindle motor 13a and the rotary guide bush spindle motor 13b are output to the main axis control unit 10a and the guide bush axis control unit 10b, respectively.
  • These rotational position commands are recalculated by the main axis control unit 10a and the guide bush axis control unit 1Ob into servo position commands per unit time according to the acceleration / deceleration pattern specified in advance. Data is output to the input / output circuit 1 1 overnight. These servo position commands are transmitted via the data input / output circuit 11 to the main spindle amplifier 12a and the guide bush spindle amplifier 12b, respectively.
  • the main spindle amplifier 12a and the guide bush spindle amplifier 12b rotate the main spindle motor 13a and the rotary guide bush spindle motor 13 while controlling the position according to the received support position command.
  • the acceleration / deceleration pattern of the main shaft controller 10a corresponding to the main spindle motor 13a for the main spindle and the guide bush shaft controller 10b corresponding to the rotary guide bush spindle motor 13b is shown. But adjusted to be the same Therefore, the peak 103 and the low guide bush 105 that are chucked to the main spindle 104 can rotate synchronously even when the rotational speed is changing.
  • the machining program analysis processing unit 3 outputs the analysis result to the ladder circuit 5 through the machine control signal processing unit 6.
  • the rotation start signal is turned off in response to the rotation stop instruction M5.
  • Machine control signal processing unit 6 Detects that the power rotation start signal is turned off and notifies interpolation processing unit 4 of a rotation stop instruction.
  • a rotation speed command 0 is issued to the main axis control section 10a and the rotary guide bush axis control section 10b.
  • This command is recalculated to a servo position command according to the acceleration / deceleration pattern specified in advance by the main axis control unit 10a and guide bush axis control unit 10b, and is output to the data input / output circuit 11 Is done.
  • the servo position command is transmitted to the main spindle amplifier 12a and the guide bush spindle amplifier 12b via the data input / output circuit 11.
  • These main spindle amplifiers 12a and guide bush spindle pumps 12b must decelerate to a stop while synchronizing the main spindle motor 13a and the mouth guide guide bush spindle motor 13b according to the received command. become.
  • Fig. 14 shows how the current value of the main shaft 13b changes during actual cutting.
  • the current value I 1 is flowing as a current through the motor guide bush 13b.
  • the current of the rotary guide bush spindle motor 13b gradually increases from the current value I1 and increases at the current value I2. Will be fixed. This current value I2 continues until time t2 when cutting ends. Then, after the end of the cutting, the current value decreases again, and returns to the current value I1 necessary for rotating the mouth guide bush 1005.
  • the inner diameter of the rose guide bush 1005 is D2
  • the main spindle 100 4 chucks the round workpiece 100 3 and rotates in the direction of arrow A
  • the rotary guide bush 100 5 is also chucked to the main spindle 100 4. It rotates in the direction of arrow A in synchronization with the round work 1003.
  • TCD g corresponds to the distance between point C and point D.
  • the connection between the rotary guide bush 1005 and the round workpiece 1003 Since the frictional resistance at the contact point is small, slippage occurs between the mouth-joint guide bush 105 and the round work 1003 as appropriate. Therefore, when the round work 1003 has just made one rotation, the lowway guide bush 1005 is not at the point D but at the point C. In this state, not much current is required to rotate the rotary guide bush spindle 13b.
  • the round work 1003 receives a cutting load from the direction of arrow E due to turning or the like, the frictional resistance at the contact point increases, and the rotary guide bush 1005 and the round work 1 0 3 hardly slip. Become. At this time, if the round work 1003 turns exactly one turn, the mouth bushing guide bus 1005 is at point D. However, since the rotation command position for the rotary guide bush 105 is point C, the mouth-reverse guide bush spindle motor 13b overcomes the frictional resistance due to the cutting load and tries to position it at point C to overcome the frictional resistance. appear.
  • the rotary guide bush spindle motor driving the rotary guide bush is used. Since the current flowing in the evening 13b becomes large from the start of cutting to the end of cutting, the rotor guide bush spindle motor 13b generates heat, and the generated heat passes through the timing belt 107 or the atmosphere. There was a problem that the guide bush 1005 was transmitted to the mouth and the guide bush 1005 was heated and the machining accuracy of the workpiece 103 was deteriorated.
  • the correction amount of the rotational position command of the main shaft motor 13b is calculated based on the rotational position command of the main shaft motor 13b, and the rotational position command obtained by correcting the correction amount with respect to the rotational position command of the main spindle motor 13a is described above. This is given as the rotation position command of the rotary guide bush spindle motor 13b to prevent the current flowing through the rotary guide bush spindle motor 13b from increasing from the start of cutting until the end of cutting. The amount of heat generated by the motor 13b is reduced.
  • the present invention is intended to solve the above-mentioned problems, and does not use expensive devices such as a spindle amplifier and a spindle motor for performing position control.
  • Another object of the present invention is to provide a spindle synchronization control method and an apparatus thereof that do not require the operator to measure the clearance between the work and the rotary guide bush.
  • the contact position between the work and the rotary guide bush that guides the work is always substantially based on the amount of clearance generated between the work and the guide bush that guides the work. This is to calculate the speed rotation command for the guide bush spindle motor that will be at the same position as shown in FIG.
  • the contact position between the work and the rotary guide bush that guides the work is always substantially the same based on the amount of clearance generated between the work and the rotary guide bush that guides the work.
  • the speed rotation command of the main spindle motor is corrected so that the position is obtained, and the corrected speed rotation command is used as the speed rotation command of the guide bush spindle motor.
  • the present invention changes the rotation speed command so that the current value of the guide bush spindle motor during cutting is reduced, and converts the rotation speed command when the current value reaches a predetermined current value to the speed of the guide bush spindle motor. This is a rotation command.
  • the present invention stores the current value of the guide bush spindle motor during non-cutting in advance, and when the current value of the guide bush spindle motor during cutting becomes substantially the same as the previously stored current value. Is the speed rotation command for the guide bush spindle motor.
  • the present invention provides a method of guiding a work and a work based on a clearance generated between the work and a rotary guide bush guiding the work. And a main shaft speed correction calculating means for calculating a speed rotation command of the guide bush main shaft motor so that the contact position with the rotary guide bush to be driven is always substantially the same position.
  • the contact position between the work and the rotary guide bush that guides the work is always substantially the same based on the amount of clearance generated between the work and the low guide bush that guides the work.
  • a spindle speed correction calculation means for correcting the speed rotation command of the main spindle motor so as to obtain the position, and using the corrected speed rotation command as the speed rotation command of the guide bush spindle motor. It is.
  • a memory in which a predetermined current value of the guide bushing spindle is stored in advance, and a current value of the guide bushing spindle in the cutting mode is substantially the same as the current value previously stored in the memory.
  • a corrected spindle speed determining means for setting the rotation speed command at the time of as follows as a speed rotation command of the guide bush spindle motor.
  • the current value stored in the memory is a current value during non-cutting of the guide bush spindle motor.
  • the speed rotation command of the guide bush spindle motor determined by the corrected spindle speed determining means is stored in a memory.
  • FIG. 1 is a main part block diagram of a numerical control device having a spindle synchronization control device according to Embodiment 1 of the present invention.
  • FIG. 2 is an explanatory diagram of a parameter setting screen of a numerical control device having a spindle synchronization control device according to Embodiment 1 of the present invention. .
  • FIG. 3 is a flowchart showing a procedure of an operator before machining according to Embodiment 1 of the present invention.
  • FIG. 4 is a flowchart showing a procedure for calculating and controlling the rotation speed command of the guide bush spindle motor from the guide bush gap amount according to Embodiment 1 of the present invention.
  • FIG. 5 is a diagram showing a current state after updating the rotation speed of the guide bush induction motor or the spindle motor according to Embodiments 1 and 2 of the present invention.
  • FIG. 6 is a main block diagram of a numerical control device having a spindle synchronization control device according to Embodiment 2 of the present invention.
  • FIG. 7 shows a procedure for updating the rotation speed command of the guide bush spindle motor according to the second embodiment of the present invention until the current value of the motor driving the guide bush becomes equal to the current value before the start of actual cutting. It is a flow chart.
  • FIG. 8 is a time chart according to Embodiment 2 of the present invention, showing a temporal change of a current flowing through a guide bush spindle motor during actual cutting in a process of calculating an appropriate rotation speed.
  • FIG. 9 shows an example of storage of a sequence number, a block number, a current value of the guide bush spindle motor during non-cutting, and rotation speed data of the guide bush spindle motor after updating according to the embodiment of the present invention.
  • FIG. 10 is a block diagram of a main part of a conventional spindle motor that drives a main spindle of an automatic lathe and a numerical control device that performs synchronous control of a spindle motor that drives a guide bush.
  • FIG. 11 is a block diagram of an automatic lathe which is a type of machine tool.
  • FIG. 12 is a detailed configuration diagram of the main spindle and the guide bush shown in FIG.
  • FIG. 13 is a diagram showing a machining program of a main part for controlling rotation and stop of the main spindle motor.
  • Fig. 14 shows the conventional guide bush spindle motor current during actual cutting. This is a time chart showing a change.
  • FIG. 15 is a cross-sectional view showing a relative relationship between a guide bush and a round work when the work is inserted.
  • Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 5 and FIG.
  • FIG. 1 is a block diagram showing a main part of the numerical control device 1 having the spindle synchronization control device according to the first embodiment
  • FIG. 2 is a diagram showing a parameter setting screen of the numerical control device 1
  • FIG. The figure shows a flow chart showing the procedure of the operator before machining
  • the figure 4 shows the procedure for controlling the rotation speed of the induction motor for the main shaft guide rod to an appropriate rotation speed from the set clearance.
  • FIG. 5 is a flow chart
  • FIG. 5 is a view showing a current state during non-cutting Z cutting of the rotary guide bush spindle induction motor 130b according to the first embodiment
  • FIG. FIG. 4 is a cross-sectional view showing a positional relationship between the two when a round work is inserted into the work.
  • FIG. 1 the same reference numerals as in the conventional example, one symbol indicates the same or a corresponding part, 41 is a spindle speed correction calculating means, 44 is a rotational speed data converting means, 101 is an analog analog output circuit, and 1 2 0 a is the invertor for the main spindle, 1 0
  • the display title is "Preparation parameter setting", and the data is set in the "# () data ()" part at the lower left of the screen.
  • the display title is "Basic 1, Basic 2, Preparatory Para, Homing, Servo" for selecting the display title of the screen. Have been.
  • two parameter items are displayed, and the parameter value of "peak outer dimension” is "20" and the parameter value of "guide bush clearance” is "0.02". Is displayed.
  • the set value is stored in the memory 7 by the parameter setting unit 8.
  • step 1 the operator measures the amount of clearance between the rotary guide bush 1005 and the round work 1003 shown in FIG. 15 using a gauge or the like.
  • step 2 the clearance measured in step 1 was changed to the value of Dg, the item of ⁇ guide bush clearance '' on the parameter setting screen of ⁇ preparation parameter setting '' shown in Fig. 2.
  • step 3 the operator turns off or disables the profile (eg, hexagonal bar) signal.
  • the profile eg, hexagonal bar
  • the profile signal may be provided on a switch of the machine operation panel, or may be set on the setting screen of the numerical controller 1.
  • the reason for providing this deformed material signal is that when a command is applied to the induction motor 130b for the mouth guide guide bush, the deformed material work is inserted between the main spindle and the rotary guide bush. In this case, this correction causes the induction motor 130a for the main spindle and the induction motor 130b for the rotary guide bush spindle to repel each other, causing the inserted deformed workpiece to be twisted.
  • step 10 the spindle speed correction calculation means 41 checks the deformed material signal set in step 3. If the profile signal is on, do nothing and exit. If the profile signal is off, go to step 11.
  • step 11 the data (guide bush clearance amount) set in memory 7 in step 2 is read by guide bush spindle speed correction calculation means 41, and if the corresponding set value is "0", the step is executed. If it is other than "0", go to step 13.
  • step 12 the rotation start signal and the rotation speed data input to the machine control signal processing unit 6 are passed to the interpolation processing unit 4, and the interpolation processing unit 4 starts the rotation of the rotation speed data and the main spindle induction motor 130. Convert to the rotation speed command of a.
  • the induction motor 130a for the main spindle and the induction motor 130b for the mouth bushing guide bush are set by parameters in advance so that they are always synchronously controlled.
  • the rotation speed command of the induction motor 130b for the rotary guide bush spindle is calculated from the rotation speed data of the main spindle induction motor 130a.
  • the rotation speed command of the main spindle induction motor 130a and the low-speed guide bushing induction motor 130b is specified by the rotation speed data conversion means 44. Converted to voltage command, one of the command methods for 0b.
  • the maximum number of revolutions (for example, 500 rpm) of the induction motors 130a and 130b to be controlled is previously determined by an incubator. Set to 120a and 120b. With this setting, the normal chamber device can rotate the induction motor at an input voltage of 10 V and a maximum rotation speed of 50,000 rpm.
  • the rotation speed data conversion means 44 converts the rotation speed command calculated by the interpolation processing unit 4 into a voltage command. ⁇ For example, when the rotation speed command is 100 000 rpm, the voltage command is
  • the analog data output circuit 101 outputs the voltage command input from the rotation speed data conversion means 44 to the inverter devices 120a and 120 as an actual voltage, that is, an analog voltage.
  • a voltage of 2 V is applied to the inverter devices 120a and 120b.
  • the inverter devices 120a and 120b detect the applied voltage from the analog data output circuit 101 and drive the induction motor 1300 at the corresponding rotation speed (100 rpm in this example).
  • a, 130b is controlled and the process is terminated. '
  • step 13 will be described.
  • the rotary guide bushing 1005 requires that the contact point when the round workpiece 1003 makes one rotation is the same as the contact point one rotation before. It is necessary that the speed of the inner circumference of the deboss 1005 and the outer circumference of the round work 1003, that is, the peripheral speed be the same. This can be expressed by the following formula (1).
  • the spindle speed correction calculation means 41 reads out the data (work outer dimensions, clearance between the bush 1005 and the round work 1 0 3) set in the memory 7 in step 2. Calculate the rotation speed of the induction motor 130b for the mouth-rigid bush spindle using equation (2).
  • the calculation based on the specific example is as follows.
  • the gear ratio (burry ratio) of the first guide bush 1, 0 05 and the rotary guide bush induction motor 13 0 b is 1: 1
  • step 14 the spindle speed correction calculation means 41 converts the result calculated in step 13 into a voltage command through the rotation speed data conversion means 44, and furthermore, the analog data output circuit 101 An analog voltage is output to the input device 120b for the mouthpiece guide bush spindle via the interface.
  • the voltage command is
  • the rotary guide bush spindle invertor device 120b is connected to the analog guider for the guide motor for the guide bush spindle. Rotate according to the voltage applied from road 101. As a result, the rotary guide bush spindle induction motor 130b rotates at a slightly lower rotational speed than the main spindle induction motor 130a overnight.
  • the contact point C between the inside diameter of the low guide bush 100 and the outside part of the round workpiece 1003 is point D after one rotation as described above.
  • the rotation speed of the rotary guide bush 1005 is also rotating at the rotation speed calculated by the above-described formula (2), the rotation speed of the rotary guide bush 1005 is reduced to the round workpiece 100. Since the rotation speed is lower than the rotation speed of 3, the relative relationship of the contact point between the inner diameter portion of the rotary guide bush 105 and the outer shape portion of the round workpiece 1003 becomes the same.
  • the guide motor 130b for the rotary guide bush spindle does not generate extra torque.
  • the current of the rotary guide bush spindle induction motor 1300b during cutting (between t1 and t2) is the same as the current value I1 during non-cutting.
  • the heat of 30b is the same during cutting as in non-cutting.
  • the rotation speed of the motor guide bush spindle motor is controlled to an appropriate rotation speed when the clearance amount cannot be measured.
  • FIG. 5 is a diagram showing the current state of the non-cutting / cutting of the first and second tapping guide bush spindle motors 13b after the second machining according to the second embodiment
  • FIG. 6 is a spindle synchronous control device.
  • Fig. 7 is a block diagram showing the main part of the numerical control device 1 having Flow guide showing the procedure for controlling the rotation speed of the motor bushing 13b to an appropriate rotation speed in order to suppress the rise in the drive current value. Machining of spindle motor 13b Low-axis guide bush in the process of calculating the appropriate rotation speed at the first time
  • Fig. 9 shows the current change during cutting of spindle motor 13b during actual cutting.
  • FIG. 7 is a diagram showing an example of storage in a memory 7 of a corresponding sequence number, block number, current value of a rotary guide bush spindle motor 13b, and a rotation speed of a rotary guide bush spindle motor 13b.
  • the gear ratio between the main spindle and the main spindle motor 13a is 1: 1.
  • the gear ratio between the rotary guide bush and the low guide bush spindle motor 13b is also 1: The following will be described as 1.
  • step 20 the corrected spindle speed determining means 42 checks the deformed material signal. If the profile signal is on, do nothing and exit. If the profile signal is off, go to step 21.
  • the rotation start signal and rotation speed data are passed to the machine control signal processing unit 6 and the rotation speed data are passed to the interpolation processing unit 4, and the interpolation processing unit 4 rotates the main spindle motor 13a from the rotation speed data. Convert to speed command.
  • the rotation speed of the rotary guide bush spindle motor 13b is determined from the rotation speed data of the main spindle motor 13a. Calculate the degree command.
  • the rotation speed command of the spindle motor 13b can be output to the main shaft controller 10a and the guide bush controller 10b, respectively.
  • rotational speed commands are output to the data input / output circuit 11 as step-like commands in the main axis control unit 10a and the guide bush axis control unit 10b. These rotational speed commands are transmitted via the input / output circuit 11 to the main spindle amplifier 12a and the guide bush spindle amplifier 12 respectively.
  • the main spindle amplifier 12a and the guide bush spindle amplifier 12b rotate the main spindle motor 13a and the rotary guide bush spindle motor 13b by speed control according to the received rotation speed command.
  • the data input / output circuit 11 is connected to the main spindle amplifier 12 a.
  • the guide bush spindle amplifier 12 b by serial communication, the main spindle amplifier 12 a and the guide
  • the interpolation processing unit 4 can acquire the data of the bush spindle amplifier 1 2b, for example, the data such as the actual rotation speed and current value, via the data input / output circuit 11 and the axis control units 10a and 10b. It is possible.
  • the current change detection means 43 reads the current value of the rotary guide bush spindle motor 13 b via the data input / output circuit 11 and the axis control unit 10 b, and after starting the cutting feed command, Check if the current value of the low-power guide bush motor 13b increases.
  • the start of the cutting feed command is executed by reading information on the cutting program instructions (straight line (G 1), circular arc (G 2, G 3), thread cutting (G 3 2), etc.) from the machining program analysis processing unit 3. judge. If the increase in the current value cannot be confirmed, it is determined that the actual cutting is not being performed, and the processing is terminated. If an increase in the current value is confirmed, it is determined that actual cutting has started, and the process proceeds to step 23.
  • step 23 the current change amount detecting means 43 immediately before the current value increases (not The information of the sequence number and block number of the corresponding machining program 2 (when cutting) is acquired from the machining program analysis processing unit 3 and stored together with the current value immediately before the increase of the 13 b of the mouthpiece guide bush. For example, it is stored in the memory 7 in a table as shown in FIG. The current value is stored as the actual current value Z rated current value “%” because the current value is fed back from the spindle amplifier 12b as the actual current value. Then, the current change amount detecting means 43 notifies the corrected spindle speed determining means 42 that the actual cutting has started.
  • the corrected spindle speed determining means 42 receives the notification from the current change amount detecting means 43 and receives the current value of the current mouth guide guide bush spindle motor mode 13b (actual current value / rated current value). (%)) And the current value (actual current value Z rated current value ()) of non-cutting of the low guide guide bush spindle motor 13 b stored in the memory 7 in step 23 and 3 are compared. If the current value stored in the memory 7 does not match the current value of the current single guide bushing spindle motor 13b, the process proceeds to step 25. If they match, go to step 26.
  • the corrected spindle speed determination means 42 subtracts a predetermined value from the rotation speed command to the rotary guide bush spindle motor 13b and issues a command to the rotary guide bush spindle motor 13b.
  • a predetermined value is 1 rpm
  • 500 rpm-1 rpm 4999 rpm
  • 4 '9 9 9 rpm is used as the rotation speed command to control the rotor guide bush spindle motor 13b.
  • the predetermined value is a parameter set by the parameter setting unit 8, and is determined by the operator.
  • the current value stored in memory 7 in step 24 matches the current value of current bushing spindle motor 13b
  • the rotation speed of the rotary guide bush spindle motor 13b is 4995 rpm
  • the current value of the rotary guide bush spindle motor 13b is the same as that during non-cutting. That is, as shown in FIG. 8, cutting starts at time t1, and the current value of the low guide guide bush spindle motor 13b rises from I1 to I2, but at time t3, the corrected spindle speed determining means
  • 4 2 starts correcting the rotation speed command to the guide bush spindle motor 13 b
  • the current value of the rotary guide bush spindle motor 13 b starts to decrease, and finally the current value during non-cutting.
  • step 26 the rotation speed of the rotary guide bush spindle motor 13b determined by the guide bush spindle speed correction determining means 42 is added to the sequence number and block number of FIG. 9 stored in step 23. Write to the corresponding item.
  • the data (rotation speed) stored in the memory 7 in the first machining as shown in FIG. 4 2 is read out, and the actual rotation speed is output as a command with the corresponding sequence number and block number to the mouth-luggage guide bush motor shaft 13b. This process is repeated each time the corresponding sequence number or block number is detected.
  • the current at the mouth of the guide bush 13b and the current at 13b during cutting are the same as the current I1 during non-cutting.
  • the heat generated by the motor 13b for the rotary guide bush spindle is the same during cutting as when not cutting.
  • the current value is changed from the spindle amplifier 12b to the actual value. Since the current value is stored as the actual current value and the rated current value (%) in the memory 7 because the current value is fed back as the Z rated current value (%), the current value stored in the memory 7 and the current value are stored. Although the description has been given of the case where the comparison of the values is performed in terms of%, the actual current value itself may be stored in the memory 7 and the current value itself may be compared.
  • the speed rotation command when the current value during cutting becomes the same as the current value of the guide bush spindle motor during non-cutting stored in the memory 7 A description has been given of what is used as the rotation command.However, the speed rotation command when the current value during cutting is close to the current value of the guide bush spindle motor during non-cutting stored in the memory 7 is described below. It may be used as a speed rotation command.
  • control using only the rotation speed command is performed.
  • inexpensive devices such as inverters and induction motors without using expensive devices such as spindle amplifiers and spindle motors for performing conventional position control.
  • a large current does not flow through the motor driving the guide bush, and the motor driving the guide bush does not flow. It has the effect of eliminating the effect of evening heat on the machining accuracy of the machine and improving the machining accuracy of the machine.
  • the work and the first guide bush are used. This eliminates the need for the operator to measure the clearance amount, thereby eliminating the measurement error of the operator and improving the reliability of the rotation speed command setting.
  • the spindle amplifier and the spindle motor are used, since the control is performed only by the rotation speed command, it is possible to use the inexpensive spindle amplifier and the spindle motor among the spindle amplifier and the spindle motor.
  • a detector required for position control is not required, the cost is not as low as the combination of the inverter and the induction motor, but it can be realized at a lower cost than the conventional configuration.
  • the spindle synchronous control method and apparatus according to the present invention are suitable for performing synchronous control of a main spindle such as an automatic lathe and a guide bush spindle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Turning (AREA)
  • Numerical Control (AREA)

Abstract

L'invention concerne un appareil de commande synchrone de broche. Cet appareil commande la vitesse d'un moteur à induction de broche principale (130a) pour entraîner une broche principale (1004) afin de maintenir une pièce (1003) et la vitesse d'un moteur à induction d'une douille de guidage rotative (130b) pour entraîner une douille de guidage rotative (1005) et guider cette pièce (1003). Cet appareil comprend des moyens de calcul de correction de vitesse de broche (41) pour calculer une commande de vitesse de rotation pour le moteur à induction de la douille rotative (130b) en se fondant sur le jeu entre la pièce (1003) et la douille de guidage rotative (1005). L'appareil comprend également des moyens de conversion (44) de données de vitesse de rotation pour commander le moteur à induction (130b) à l'aide de la commande de vitesse de rotation calculée par les moyens de calcul de la correction de la vitesse de broche (41) sous forme de la commande de vitesse de rotation pour le moteur à induction (130b). Lorsque la pièce présente une forme équivalente à celle d'une barre arrondie, aucun courant élevé ne circule dans le moteur pour entraîner la douille de guidage pour couper la pièce et par conséquent aucune chaleur n'est générée.
PCT/JP2002/003436 2002-04-05 2002-04-05 Procede de commande synchrone de broche et appareil specialement prevu pour ce procede WO2003084699A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2002/003436 WO2003084699A1 (fr) 2002-04-05 2002-04-05 Procede de commande synchrone de broche et appareil specialement prevu pour ce procede
TW091107840A TW524725B (en) 2002-04-05 2002-04-17 Method and device for main shaft synchronous control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2002/003436 WO2003084699A1 (fr) 2002-04-05 2002-04-05 Procede de commande synchrone de broche et appareil specialement prevu pour ce procede

Publications (1)

Publication Number Publication Date
WO2003084699A1 true WO2003084699A1 (fr) 2003-10-16

Family

ID=28470428

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2002/003436 WO2003084699A1 (fr) 2002-04-05 2002-04-05 Procede de commande synchrone de broche et appareil specialement prevu pour ce procede

Country Status (2)

Country Link
TW (1) TW524725B (fr)
WO (1) WO2003084699A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112017003251T5 (de) * 2017-12-21 2019-09-05 Mitsubishi Electric Corporation Numerische Steuerungsvorrichtung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62199304A (ja) * 1986-02-24 1987-09-03 Citizen Watch Co Ltd 自動旋盤
JPH1034401A (ja) * 1996-07-26 1998-02-10 Mitsubishi Electric Corp 主軸同期制御方法及びその装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62199304A (ja) * 1986-02-24 1987-09-03 Citizen Watch Co Ltd 自動旋盤
JPH1034401A (ja) * 1996-07-26 1998-02-10 Mitsubishi Electric Corp 主軸同期制御方法及びその装置

Also Published As

Publication number Publication date
TW524725B (en) 2003-03-21

Similar Documents

Publication Publication Date Title
JP4565034B2 (ja) イナーシャ推定を行う制御装置及び制御システム
CN106239257B (zh) 机床的控制装置以及控制方法
JP5751433B2 (ja) モータ制御装置及びモータ制御方法
JP5878794B2 (ja) 主軸位置決め装置
JP6140223B2 (ja) 主軸と送り軸との同期運転を制御する工作機械の制御装置及び制御方法
US9753452B2 (en) Device and method of controlling machine tool, to control synchronized operation of spindle axis and feed axis
US11003170B2 (en) Parameter determination support device, and non-transitory computer-readable medium encoded with program
JP2005313280A (ja) 数値制御装置
WO2003084699A1 (fr) Procede de commande synchrone de broche et appareil specialement prevu pour ce procede
JP2010160019A (ja) 回転バランス修正装置及び方法
JP2007105809A (ja) 工作機械の主軸駆動ベルトのスリップ検出方法
JP2012091238A (ja) ワイヤソー
WO2021177235A1 (fr) Dispositif de commande et programme
CN111230586B (zh) 控制装置以及控制方法
JP2003005813A (ja) オービットボーリングの制御方法
JP4110959B2 (ja) 主軸同期制御方法及びその装置
JP3648858B2 (ja) 主軸同期制御方法及びその装置
US9610637B2 (en) Tailstock control device
JP2017022810A (ja) モータ駆動制御装置およびこれを備えた工作機械
JP6949813B2 (ja) パラメータ決定支援装置、パラメータ決定支援方法、及びプログラム
JP6949814B2 (ja) パラメータ決定支援装置、パラメータ決定支援方法、及びプログラム
JP7294901B2 (ja) ファンモータ、ファンモータ駆動装置、及び冷却装置
CN110161974B (zh) 参数决定辅助装置和记录有程序的计算机可读介质
JP2022011694A (ja) モータアンプ及び角度調整方法
JP2005346298A (ja) 工作機械の制御装置

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CN DE JP KR US

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
NENP Non-entry into the national phase

Ref country code: JP